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Why can a person with brown eyes carry blue eye alleles but a person with blue eyes cannot have a brown eye allele in their genotype?
Wiki User
∙ 12y ago
Because the brown eyes allele is the dominant one.
Wiki User
∙ 12y ago
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What is an example of allele?
an allele is an alternative form of a gene that governs a characteristic, like hair or eye color. an individual gets 1 allele for each charecteristic from each parent. There are dominant alleles and recessive alleles. The dominant allele is the allele that is the person's physical appearance, and the recessive allele is the one that isn't visible but the person has in his/her genotype.
What is an individual with genotype AAA described as?
An Aa genotype can result in the same phenotype as either an AA or AA genotype, if one of the alleles acts in a dominant fashion. If the A allele is dominant over the a allele, then the phenotype of a heterozygous (Aa) individual will be the same as the phenotype of a homozygous dominant (AA) individual.
Which of the following best describes a person's genotype?
The alleles that a person has The genes that a person has
Which of the following is a genotype TA ta Tt or none of these?
Tt is a genotype. Each letter is called an allele and represents a different trait. For instance, the T could stand for tall, and the t could stand for short. Because the T is a capital letter, it is the dominant trait. In the case of Tt, the person would be tall. If the genotype was TT, the person would again be tall. If the genotype was tt, the person would be short. All traits are represented by two or more alleles. Things like blood type are represented by multiple alleles.
What happens to the recessive allele in a heterozygous offspring?
The recessive allele is present, but not shown in complete dominance. This is because the dominant allele is completely dominant over the recessive allele, therefore it is shown, while the recessive allele is hidden.
What are the two ways to have blood type A bio?
A person can have type A blood with a homogenous genotype (two A alleles). In addition, you can be heterozygous A (one O and one A allele).
What is an example of a heterozygous genotype?
Genotype means the particular alleles an individual has alleles are just a kind of gene and a gene is a section of DNA which codes for a particular protein or characteristic in an organism. Heterozygous is when a person has 2 alleles for the same characteristic like hair you could have the allele for both blonde or brown hair but due to the blonde one being recessive (ie not as powerfull/strong), you would not know. So, an example would be WBWb: B = Brown b = blonde W= allele so for hair a heterozygous person would have the genotype WBWb.
What is an example of allele?
an allele is an alternative form of a gene that governs a characteristic, like hair or eye color. an individual gets 1 allele for each charecteristic from each parent. There are dominant alleles and recessive alleles. The dominant allele is the allele that is the person's physical appearance, and the recessive allele is the one that isn't visible but the person has in his/her genotype.
How do you find the possible genotypes of the children of a woman with blood type O and a man with blood type AB?
There are three alleles for blood type which can be represented by IA, IB, and i. A person with blood type O has the genotype ii. A person with blood type AB has genotype IAIB. If these two people produce children, those children will inherit one allele from each parent. They will therefore certainly inherit the i allele from their mother and either the IA or the IB from their father. The children with the genotype IAi will have type A blood, since the IA allele is dominant to the i allele. The children with the genotype IBi will have type B blood, since the IB allele is also dominant to the i allele.
What is an individual with genotype AAA described as?
An Aa genotype can result in the same phenotype as either an AA or AA genotype, if one of the alleles acts in a dominant fashion. If the A allele is dominant over the a allele, then the phenotype of a heterozygous (Aa) individual will be the same as the phenotype of a homozygous dominant (AA) individual.
Which of the following best describes a person's genotype?
The alleles that a person has The genes that a person has
Which of the following is a genotype TA ta Tt or none of these?
Tt is a genotype. Each letter is called an allele and represents a different trait. For instance, the T could stand for tall, and the t could stand for short. Because the T is a capital letter, it is the dominant trait. In the case of Tt, the person would be tall. If the genotype was TT, the person would again be tall. If the genotype was tt, the person would be short. All traits are represented by two or more alleles. Things like blood type are represented by multiple alleles.
How are Genotype phenotype different?
Phenotypes are the traits expressed by the genotype. So, for blood type, a person can have A and i alleles (genotype). However, in the phenotype, since i is recessive, only the A will be expressed, and the person will have an A blood type.
Can you get Cystic fibrosis?
Cystic fibrosis is a genetic disease and can only be inherited through genes. It all depends on your parents alleles. Let's say that the allele for cystic fibrosis is c. If your Mum has the allele Cc it means she is hetrozygous. If you Dad has the same allele he is also hetrozygous. When they had children, the two small c's could come together to make a child with the alleles cc. (This means that the child has cystic fibrosis and has homozygous reccessive alleles.) When they had children their alleles could also come together to make CC (homozygous dominant- this means that person doesn't carry an allele for cystic firbrosis and will never get it. This means that if that person had children with another person who has the alleles CC, their child wouldn't get it), or it could make a child with Cc alleles. The child with Cc alleles wouldn't get cystic fibrosis because the allele big C (dominant allele) over powers the allele small c (reccessive- the cystic fibrosis allele). Although this person doesn't have cystic fibrosis their children might because they carry the allele for cystic fibrosis, which is c.
What happens to the recessive allele in a heterozygous offspring?
The recessive allele is present, but not shown in complete dominance. This is because the dominant allele is completely dominant over the recessive allele, therefore it is shown, while the recessive allele is hidden.
A person receives an o allele and an A allele for blood type. what is the individual's blood type?
type A
What genotype must the person have who possessed the recessive phenotypes?
The genotype is homozygous recessive or the recessive trait is on the X chromosome and has no corresponding allele on the Y chromosome.
